User`s manual

48 RabbitCore 2000
D.1 RS-232/RS-485 Serial Communication
Figure D-1. Sample RS-232 and RS-485 Circuits
Sample Program: PUTS.C in SAMPLES/SERIAL.
VCC
100 nF
100 nF
1
3
4
5
100 nF
100 nF
R2OUT
R2IN
R1OUT
R1IN
T2OUT
T2IN
T1OUT
T1IN
11
10
12
9
14
7
13
8
RXC
RXB
TXC
TXB
PC2
PC5
PC3
PC4
V+
V
2
6
C1+
C1
C2+
C2
J2
18
20
17
19
RS-232
Rabbit 2000
Core Module
J2
3
2
1
4
6
7
A
B
D
R
DE
RE
PC0
PC1
PD5
15
16
28
47 kΩ
680 Ω
680 Ω
220 Ω
485+
485
VCC
RS-485
Rabbit 2000
Core Module
SP483EN